StorckAerfast.4 Comp
Newer version: Storck Aerfast.5 Pro
The entry Comp frame class of Storck's previous-generation Aerfast.4 aero race bike, still sold direct. TOUR measured a Comp Disc at 202 W at 45 km/h, a watt off the Pro, making it one of the fastest bikes it had tested at its price. Builds run from 11-speed Shimano 105 to Force AXS, most with Storck's Zeitjaeger Comp carbon wheels.
- From
- €3,399€3,399€3,399
- Builds
- 6
- Sizes
- 6
- Frame weight
- 950 g33.5 oz
Our verdict
Overall
out of 100, average of 6 categories
One of the cheapest ways onto a tunnel-proven aero frame, with carbon wheels on most builds and TOUR's 202 W to back it up. It's a 2021 design with a 28 mm tyre limit, one cockpit size per frame, a harsh seatpost and Storck's lowest carbon grade.
Scored Nov 2026
- + Affordable way in
- + Aero-first design
AI-drafted from the specs on this page and reviewed before publishing. Scores are relative to every bike in the catalog when they were given, so they drop as newer bikes and parts raise the bar.
- Aero
- 85/100
- Frame
- 64/100
- Components
- 58/100
- Fit
- 72/100
- Practicality
- 58/100
- Price
- 97/100
Aero claims and front-end integration
Carbon grade, weight and warranty
Groupset, wheels and power meter
Sizes and adjustment range
Travel, standard parts, servicing
From the cheapest complete-bike MSRP
Bike duel
Frame & platform
Frame & fork
- Frame material
- Carbon (CFR/UD), Comp grade
- Frame weight
- 950 g33.5 oz
- Fork weight
- 500 g17.6 oz
- Frameset weight
- 1,900 g4.19 lb
- Weight measured on
- Storck's 'from' weights on its Aerfast.4 Platinum and Pro frameset pages (frame, fork, one-piece cockpit; frameset includes seatpost and headset); not split by grade or size
- Max system weight
- 120 kg264.6 lb
- Frame sizes
- XS, S, M, L, XL
- Colours
- Matt Black
- Also available as
- Aerfast.4 Platinum, Pro, Comp and Red Edition (frame classes of the same design, same geometry); succeeded by the Aerfast.5
- UCI frame approval
- On the UCI list of approved framesets as 'AERFAST.3 / AERFAST.4' (code STOR-AEF), approved 8 Feb 2023 in sizes XS-XXL (6) (UCI list version 2026.10.02); the list doesn't distinguish the grades
Compatibility & standards
- Brake type
- Hydraulic disc, flat mount (160 mm rotors front and rear as built)
- Max tire width
- 28 mm
- Bottom bracket standard
- Press-fit, 41 mm bearing bore x 86.5 mm
- Cable routing
- Internal through the one-piece cockpit
Fit & adjustability
- Cockpit
- One-piece Storck RBSU Aerfast.4 bar and stem, one size per frame size
- Seatpost type
- Storck Aerfast.4 carbon aero seatpost
- Fit notes
- Each frame size comes with one cockpit size, from 380 mm bar / 90 mm stem (XS) to 440 / 120 mm (XXL). Storck says a computer mount and triathlon extensions can be retrofitted, and lists its TT kit as compatible with the Aerfast.4.
Aerodynamics
- Manufacturer aero claims
- Storck says the Aerfast.4 measured 199 W at 45 km/h in TOUR's wind-tunnel test; TOUR's own figures were 201 W for the Pro Disc and 202 W for the Comp Disc
- Testing method
- Wind tunnel
- Tube profile
- 80 mm wide aero fork with a camtail trailing edge
Travel, maintenance & warranty
- Proprietary parts
- RBSU Aerfast.4 one-piece cockpit, Aerfast.4 seatpost and headset
- Sold via
- Direct from Storck's web shop and Storck stores
Photos
Builds & components
Highlighted rows differ between builds. Green marks the best value.
Aerfast.4 Comp 105 (11-speed) | Aerfast.4 Comp 105 | Aerfast.4 Comp 105 Di2 | Aerfast.4 Comp Rival AXS E1 | Aerfast.4 Comp Ultegra Di2 | Aerfast.4 Comp Force AXS E1 | |
|---|---|---|---|---|---|---|
| Overview | ||||||
| Price (MSRP) | €3,399€3,399€3,399 | €3,699€3,699€3,699 | €4,299€4,299€4,299 | €4,999€4,999€4,999 | €4,999€4,999€4,999 | €5,399€5,399€5,399 |
| Type | Complete bike | Complete bike | Complete bike | Complete bike | Complete bike | Complete bike |
| Notes | Colour Matt Black; 11-speed Shimano 105 R7000 with DT Swiss PR 1600 Spline 32 alloy wheels. MSRP €3,399; Storck showed it reduced to €2,999 on 2 Nov 2026. Price from Storck's own web shop (EUR only). No power meter. | Colour Matt Black. Price with Storck Zeitjaeger Comp 40R wheels (size M). Prices from Storck's own web shop (EUR only). No power meter. Storck's spec list names only the rear derailleur. | Colour Matt Black. Price with Storck Zeitjaeger Comp 40R wheels (size M). Prices from Storck's own web shop (EUR only). No power meter. | Colour Matt Black. Price with Storck Zeitjaeger Comp 40R wheels (size M). Prices from Storck's own web shop (EUR only). | Colour Matt Black. Price with Storck Zeitjaeger Comp 40R wheels (size M). Prices from Storck's own web shop (EUR only). No power meter. Storck's spec list names the cassette 'Ultegra R8150'. | Colour Matt Black. Price with Storck Zeitjaeger Comp 40R wheels (size M). Prices from Storck's own web shop (EUR only). No power meter. |
| Drivetrain | ||||||
| Groupset | Shimano 105 R7000 | Shimano 105 R7100 | Shimano 105 Di2 R7100 | SRAM Rival AXS E1 | Shimano Ultegra Di2 R8100 | SRAM Force AXS E1 |
| Launched | 2018 · replaced by Shimano 105 R7100 (2023) | 2023 · current generation | 2022 · current generation | 2025 · current generation | 2021 · current generation | 2025 · current generation |
| Speeds | 11-speed | 12-speed | 12-speed | 12-speed | 12-speed | 12-speed |
| Electronic | No | No | Yes | Yes | Yes | Yes |
| Wireless | — | — | — | Yes | — | Yes |
| Drivetrain | 2x | 2x | 2x | 2x | 2x | 2x |
| Shifters | Shimano 105 R7000 | Shimano 105 ST-R7120 | Shimano 105 Di2 ST-R7170 | — | — | SRAM Force AXS E1 |
| Notes | Mechanical shift and hydraulic brake levers | Mechanical shifting with hydraulic brake levers | Combined shift and hydraulic brake levers | — | — | Combined shift and hydraulic brake levers |
| Crankset | Shimano 105 R7000 | Shimano 105 R7100 | Shimano 105 R7100 | SRAM Rival AXS E1 Power Meter | Shimano Ultegra R8100 | SRAM Force AXS E1 |
| Chainrings | 50/34 | 52/36 | 52/36 | 48/35 | 52/36 | 48/35 |
| Crank lengths available | 170 mm (XS-S), 172.5 mm (M-L), 175 mm (XL-XXL) | 170 mm (XS-S), 172.5 mm (M-L), 175 mm (XL-XXL) | 170 mm (XS-S), 172.5 mm (M-L), 175 mm (XL-XXL) | 170 mm (XS-S), 172.5 mm (M-L), 175 mm (XL-XXL) | 170 mm (XS-S), 172.5 mm (M-L), 175 mm (XL-XXL) | 170 mm (XS-S), 172.5 mm (M-L), 175 mm (XL-XXL) |
| Spindle | — | — | — | — | — | DUB |
| Power meter | — | — | — | SRAM Rival AXS E1 Power Meter | — | — |
| Launched | — | — | — | 2025 · current generation | — | — |
| Notes | — | — | — | Storck lists the crank as 'SRAM Rival E1 AXS Quarq' | — | — |
| Bottom bracket | Storck Press-fit 41 x 86.5 mm | Storck Press-fit 41 x 86.5 mm | Storck Press-fit 41 x 86.5 mm | Storck Press-fit 41 x 86.5 mm | Storck Press-fit 41 x 86.5 mm | Storck Press-fit 41 x 86.5 mm |
| Standard | Press-fit, 41 mm bearing bore x 86.5 mm | Press-fit, 41 mm bearing bore x 86.5 mm | Press-fit, 41 mm bearing bore x 86.5 mm | Press-fit, 41 mm bearing bore x 86.5 mm | Press-fit, 41 mm bearing bore x 86.5 mm | Press-fit, 41 mm bearing bore x 86.5 mm |
| Front derailleur | — | — | — | — | Shimano Ultegra Di2 | SRAM Force AXS E1 |
| Rear derailleur | Shimano 105 R7000 | Shimano 105 R7100 | Shimano 105 Di2 R7150 | — | Shimano Ultegra Di2 R8150 | SRAM Force AXS E1 |
| Max cog | — | — | — | — | — | 36T |
| Cassette | Shimano 105 R7000 | Shimano 105 R7101 | Shimano 105 R7101 | SRAM Rival XG-1250 | Shimano Ultegra R8100 | SRAM Force XG-1270 E1 |
| Range | 11-30 | 11-34 | 11-34 | 10-36 | 11-30 | 10-30 |
| Speeds | 11-speed | 12-speed | 12-speed | 12-speed | 12-speed | 12-speed |
| Chain | Shimano CN-HG601 | Shimano CN-M7100 | Shimano CN-M7100 | SRAM Rival E1 Flattop | Shimano CN-M8100 | — |
| Brakes | ||||||
| Brake calipers | Shimano 105 | Shimano 105 | Shimano 105 | SRAM Rival | Shimano Ultegra | SRAM Force |
| Type | Hydraulic disc, flat mount | Hydraulic disc, flat mount | Hydraulic disc, flat mount | Hydraulic disc, flat mount | Hydraulic disc, flat mount | Hydraulic disc, flat mount |
| Notes | 160 mm rotors front and rear | 160 mm rotors front and rear | 160 mm rotors front and rear | 160 mm rotors front and rear | 160 mm rotors front and rear | 160 mm rotors front and rear |
| Wheels & tires | ||||||
| Wheelset | DT Swiss PR 1600 Spline 32 | Storck Zeitjaeger Comp 40R | Storck Zeitjaeger Comp 40R | Storck Zeitjaeger Comp 40R | Storck Zeitjaeger Comp 40R | Storck Zeitjaeger Comp 40R |
| Front rim depth | 32 mm | — | — | — | — | — |
| Rear rim depth | 32 mm | — | — | — | — | — |
| Material | Aluminium | Carbon | Carbon | Carbon | Carbon | Carbon |
| Notes | — | Price with Zeitjaeger Comp 40R; Comp 55R/65R, Zeitjaeger Pro 47/56 R and DT Swiss PR 1600 wheels change the price | Price with Zeitjaeger Comp 40R; Comp 55R/65R, Zeitjaeger Pro 47/56 R and DT Swiss PR 1600 wheels change the price | Price with Zeitjaeger Comp 40R; Comp 55R/65R, Zeitjaeger Pro 47/56 R and DT Swiss PR 1600 wheels change the price | Price with Zeitjaeger Comp 40R; Comp 55R/65R, Zeitjaeger Pro 47/56 R and DT Swiss PR 1600 wheels change the price | Price with Zeitjaeger Comp 40R; Comp 55R/65R, Zeitjaeger Pro 47/56 R and DT Swiss PR 1600 wheels change the price |
| Tires | Continental Grand Prix TR | Continental Grand Prix TR | Continental Grand Prix TR | Continental Grand Prix TR | Continental Grand Prix TR | Continental Grand Prix TR |
| Tire width | 25 mm | 25 mm | 25 mm | 25 mm | 25 mm | 25 mm |
| Cockpit | ||||||
| Handlebar | Storck RBSU Aerfast.4 | Storck RBSU Aerfast.4 | Storck RBSU Aerfast.4 | Storck RBSU Aerfast.4 | Storck RBSU Aerfast.4 | Storck RBSU Aerfast.4 |
| Type | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem |
| Integrated stem | Yes | Yes | Yes | Yes | Yes | Yes |
| Widths available | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) | 380 mm / 90 mm stem (XS), 400/100 (S), 420/100 (M-L), 420/110 (XL), 440/120 (XXL) |
| Headset | Storck Aerfast.4 integrated headset | Storck Aerfast.4 integrated headset | Storck Aerfast.4 integrated headset | Storck Aerfast.4 integrated headset | Storck Aerfast.4 integrated headset | Storck Aerfast.4 integrated headset |
| Saddle & seatpost | ||||||
| Saddle | Selle San Marco Shortfit 2.0 | Selle San Marco Shortfit 2.0 | Selle San Marco Shortfit 2.0 | Selle San Marco Shortfit 2.0 | Selle San Marco Shortfit 2.0 | Selle San Marco Shortfit 2.0 |
| Seatpost | Storck Aerfast.4 Carbon | Storck Aerfast.4 Carbon | Storck Aerfast.4 Carbon | Storck Aerfast.4 Carbon | Storck Aerfast.4 Carbon | Storck Aerfast.4 Carbon |
| Material | Carbon | Carbon | Carbon | Carbon | Carbon | Carbon |
| Bar tape | Storck Microfibre | Storck Microfibre | Storck Microfibre | Storck Microfibre | Storck Microfibre | Storck Microfibre |
| Notes | Black | Black | Black | Black | Black | Black |
Ownership checklist
0 of 1 known checks pass, 3 not published by Storck. Why these checks
- ✕
Threaded bottom bracket
Press-fit, 41 mm bearing bore x 86.5 mm
- ?
UDH derailleur hanger
- ?
Standard 12×142 mm rear axle
- ?
Works with mechanical shifting
Aerfast.4 Comp geometry
| XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|
| Rider height min | 152 cm5′0″ | 164 cm5′5″ | 170 cm5′7″ | 176 cm5′9″ | 182 cm6′0″ | 188 cm6′2″ |
| Rider height max | 166 cm5′5″ | 172 cm5′8″ | 178 cm5′10″ | 184 cm6′0″ | 190 cm6′3″ | — |
| Stack | 482 mm19″ | 500 mm19.7″ | 522 mm20.6″ | 538 mm21.2″ | 562 mm22.1″ | 576 mm22.7″ |
| Reach | 362.5 mm14.3″ | 377 mm14.8″ | 390 mm15.4″ | 400 mm15.7″ | 403 mm15.9″ | 418 mm16.5″ |
| Seat tube angle | 73° | 73° | 73° | 73° | 73° | 73° |
| Head tube angle | 70° | 71° | 72° | — | — | — |
| Head tube length | 85 mm3.3″ | 100 mm3.9″ | 115 mm4.5″ | 130 mm5.1″ | 155 mm6.1″ | 170 mm6.7″ |
| Effective top tube | 510 mm20.1″ | 530 mm20.9″ | 550 mm21.7″ | 565 mm22.2″ | 575 mm22.6″ | 595 mm23.4″ |
| Seat tube length | 458 mm18″ | 483 mm19″ | 508 mm20″ | 531 mm20.9″ | 558 mm22″ | 583 mm23″ |
| Chainstay | 410 mm16.1″ | 410 mm16.1″ | 410 mm16.1″ | 410 mm16.1″ | 410 mm16.1″ | 410 mm16.1″ |
| Crank length | 170 mm6.7″ | 170 mm6.7″ | 172.5 mm6.8″ | 172.5 mm6.8″ | 175 mm6.9″ | 175 mm6.9″ |
| Stem length | 90 mm3.5″ | 100 mm3.9″ | 100 mm3.9″ | 100 mm3.9″ | 110 mm4.3″ | 120 mm4.7″ |
| Handlebar width | 380 mm15″ | 400 mm15.7″ | 420 mm16.5″ | 420 mm16.5″ | 420 mm16.5″ | 440 mm17.3″ |
Side view
Drawn to scale (how to read it).
How the geometry rides
The Aerfast.4 Comp in size M against the middle size of 73 other bikes: tendencies from geometry, not a ride review (how to read this).
- Chainstay410 mm16.1″
shortestlonger than 63% of 73 bikeslongest
Good to know
Aerodynamics
TOUR measured the Aerfast.4 Pro Disc at 201 W at 45 km/h and the cheaper Comp Disc at 202 W; TOUR found the carbon seatpost harsh.
SourceFit
Storck's size guide gives rider heights of 152-166 cm (XS), 164-172 (S), 170-178 (M), 176-184 (L), 182-190 (XL) and from 188 cm (XXL). Its geometry table leaves the head angle blank for L-XXL.
SourceHistory
The Aerfast.4 appeared in 2021, developed with Swiss Side, and Storck has since replaced it with the Aerfast.5 while still selling the Aerfast.4; the 100-bike Final Edition marks the end of the series.
SourceVersions
Velomotion describes four Aerfast.4 frame classes: Platinum (the top frame, offered only with Dura-Ace, Ultegra Di2, Red or Force), Pro, Comp and Red, the latter a special model exclusively with SRAM Red. Storck publishes the same geometry for all of them.
Source
Aerfast.4 Comp FAQ
Is the Storck Aerfast.4 Comp UCI legal?+
Yes. The Storck Aerfast.4 Comp is UCI legal, so it can be raced in UCI-sanctioned road races.
How much does the Storck Aerfast.4 Comp cost?+
Manufacturer prices (MSRP): €3,399–€5,399 across 6 listed builds and framesets: Aerfast.4 Comp 105 (11-speed), Aerfast.4 Comp 105, Aerfast.4 Comp 105 Di2, Aerfast.4 Comp Rival AXS E1, Aerfast.4 Comp Ultegra Di2 and Aerfast.4 Comp Force AXS E1.
How much does the Storck Aerfast.4 Comp weigh?+
The frame weighs 950 g (33.5 oz) (Storck's 'from' weights on its Aerfast.4 Platinum and Pro frameset pages (frame, fork, one-piece cockpit; frameset includes seatpost and headset); not split by grade or size). The frameset weighs 1,900 g (4.19 lb).
What sizes does the Storck Aerfast.4 Comp come in?+
6 sizes: XS, S, M, L, XL and XXL. The manufacturer recommends them for riders from 152 cm (5′0″) to 190 cm (6′3″).
What is the tire clearance of the Storck Aerfast.4 Comp?+
Up to 28 mm tires.
Which groupsets are compatible with the Storck Aerfast.4 Comp?+
Bottom bracket: Press-fit, 41 mm bearing bore x 86.5 mm.
What builds of the Storck Aerfast.4 Comp are available?+
Aerfast.4 Comp 105 (11-speed): Shimano 105 R7000; Aerfast.4 Comp 105: Shimano 105 R7100; Aerfast.4 Comp 105 Di2: Shimano 105 Di2 R7100; Aerfast.4 Comp Rival AXS E1: SRAM Rival AXS E1; Aerfast.4 Comp Ultegra Di2: Shimano Ultegra Di2 R8100; Aerfast.4 Comp Force AXS E1: SRAM Force AXS E1.
Is the Storck Aerfast.4 Comp aerodynamic?+
Storck says the Aerfast.4 measured 199 W at 45 km/h in TOUR's wind-tunnel test; TOUR's own figures were 201 W for the Pro Disc and 202 W for the Comp Disc (Wind tunnel)
Sources
- https://storck-bikes.com/en/Aerfast.4-Comp/R171202246
- https://storck-bikes.com/en/Aerfast.4-Comp/R171202251
- https://storck-bikes.com/en/Aerfast.4-Comp/R171202751
- https://storck-bikes.com/en/Aerfast.4-Comp/R171203251
- https://storck-bikes.com/en/Aerfast.4-Comp/R171203851
- https://storck-bikes.com/en/Aerfast.4-Comp/R171205051
- https://storck-bikes.com/en/Aerfast.4-Comp/R171205646
- https://storck-bikes.com/en/Road-Bike/Aerfast/
- https://velomotion.net/2025/05/storck-news-2025/
- https://www.tour-magazin.de/en/professional-racing/competition-road-bike-on-test-the-storck-aerfast-4-comp-disc-ultegra/
- https://gearandgrit.com/storck-aerfast-4-pro-final-edition
- https://assets.ctfassets.net/761l7gh5x5an/7jA9krKzzy3lRXPzlm4uyn/7982d7114b9d62978cb87876ea476535/58780c70-6247-4448-8384-b145fa30aba9.pdf
- https://storck-bikes.com/en/Aerfast.4-Pro/R166984246
Storck Aerfast.4 Comp data last updated · How the data is checked ·